| ctardi |
| I'm just learning about making amplifyers. Here is what I have come up with using information from the datasheets, and bigmike216. The input power will be about 18V. The of each channel will first go thru the DRV134, and also a preamp that has not been decided yet. What all changes will need to be made? |
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| bigmike216 |
first off, the voltage will be + and - 18v, before rectification.. ;)
When I have the pcb's made, it'll be easy as pie to assemble it, won't have to worry about how to wire anything :)
do a forum earch about bridging, also search for opa549 and drv134, there's a ton of information.
Talk to me on messenger or something and I'll help you out |
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| neutron7 |
| if you must use a decoupling capacitor, use it before the DRV because any difference in capacitance will result in different low frequency response on the 2 sides of the bridge. then you will get asymetric output at those frequencies affected |
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| paulb |
| quote: | Originally posted by neutron7
if you must use a decoupling capacitor, use it before the DRV because any difference in capacitance will result in different low frequency response on the 2 sides of the bridge. then you will get asymetric output at those frequencies affected |
Why would the capacitance be any different? If you're referring to the tolerance of the capacitors, it will be a very minor effect on frequency response.
But there should be a capacitor, and resistor to ground, before the DRV134. |
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| ctardi |
| quote: | Originally posted by bigmike216
Talk to me on messenger or something and I'll help you out |
I was talking, but it was a one sided conversation. (you left signed into messenger)
A cap and resistor has been added before the 134...thanks. Other than that, does anyone see anything else majorly wrong with it? |
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| bigmike216 |
the capacitor and resistor need to be on the input.
What are you planning on doing for a power supply? |
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| ctardi |
| quote: | Originally posted by bigmike216
the capacitor and resistor need to be on the input.
What are you planning on doing for a power supply? |
i know... they are on the input in version 1.2
Not sure about the power supply right now, still looking for a transformer. |
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